HDRI use cool reflections from 2D image in 3D world

I went to a Portfolio workshop recently and learned about using HDRIs and AliasStudio PLE. It's cool for designers because it facilitates using a 2D image to create amazing reflections on a 3D model. Often using modeling programs with preset environments is frustrating because you are limited to the options that come with the software. This is great for giving your models depth and good context.